Emergency crews are investigating reports of three explosions in Colebrook, NH.
Witnesses said the explosions were felt throughout the town just after 1 p.m. Friday.
People said they saw heavy black smoke coming from the area of what they believe is the Manchester Manufacturing building.
State Fire Marshal Bill Degnan said the explosion involves a building that manufactures muzzle loaders.
Border Patrol, state and local police, the Fish and Game Department and several fire departments from the area are responding.